From: Eric Dumazet <dada1@cosmosbay.com>
Date: Sat, 25 Mar 2006 15:31:46 +0000 (+0100)
Subject: [PATCH] x86_64: group memnodemap and memnodeshift in a memnode structure
X-Git-Tag: v2.6.17-rc1~675
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=dcf36bfa5de6d4e37878d4c98b6986fee4eb8b4c;p=pandora-kernel.git

[PATCH] x86_64: group memnodemap and memnodeshift in a memnode structure

pfn_to_page() and others need to access both memnode_shift and the very
first bytes of memnodemap[]. If we force memnode_shift to be just before the
memnodemap array, we can reduce the memory footprint to one cache line
instead of two for most setups. This patch introduce a 'memnode' structure
where shift and map[] are carefully placed.

Signed-off-by: Eric Dumazet <dada1@cosmosbay.com>
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---

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